891422 has 16 divisors (see below), whose sum is σ = 1566432. Its totient is φ = 372480.

The previous prime is 891421. The next prime is 891427. The reversal of 891422 is 224198.

It is a junction number, because it is equal to n+sod(n) for n = 891391 and 891400.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 891422.

It is not an unprimeable number, because it can be changed into a prime (891421) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 203 + ... + 1350.

It is an arithmetic number, because the mean of its divisors is an integer number (97902).

2⁸⁹¹⁴²² is an apocalyptic number.

891422 is a gapful number since it is divisible by the number (82) formed by its first and last digit.

891422 is a deficient number, since it is larger than the sum of its proper divisors (675010).

891422 is a wasteful number, since it uses less digits than its factorization.

891422 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1603.

The product of its digits is 1152, while the sum is 26.

The square root of 891422 is about 944.1514708986. The cubic root of 891422 is about 96.2412191911.

The spelling of 891422 in words is "eight hundred ninety-one thousand, four hundred twenty-two".